Enable 32bit support by default on 64bit system
Remove entry about 32bit support from README
add test for multilib
gitignore: add build_package folder.
build_desura.sh: add missing exit status.
install_deps.sh: note pack_deb/rpm options if we are on debian/redhat
managers: add SingletonHolder template
managers: LanguageManager should be created without arguments
managers: use SingletonHolder for global services
managers: use reference semantic not pointer
README: mention ./build_desura.sh help
Merge pull request #493 from matthiaskrgr/stuff

Stuff
Merge pull request #490 from karolherbst/bug190

manager: change global objects to singletons
Merge remote-tracking branch 'makson96/default_32bit_support'

Conflicts:
	README
Update README - Build on Linux
README move how to install deps before deps list
Merge pull request #498 from makson96/readme_build_linux

Update README - Build on Linux
install_deps.sh: arch: we build with 32-bit support by default, thus we will need binutils-multilib by default.